{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xb727c8e8a7ad42fcaf90416433900614a692a98f6c07e8042d13efc731e7938a",
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    "signer": "0xcf135AbEA8b552C3D6DcfC900D43C34507048Eea",
    "userId": "455252061"
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}